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What is the anatomical sphincter and what is the physiological sphincter?
Wiki User
∙ 11y ago
Sphincters can be classified into functional and anatomical sphincters:
- Anatomical sphincters have a localised and often circular muscle thickening to facilitate their action as a sphincter.
- Functional sphincters do not have this localised muscle thickening and achieve their sphincteric action through muscle contraction around (extrinsic) or within (intrinsic) the structure.
Sphincters can also be voluntarily or involuntarily controlled:
- Voluntary sphincters are supplied bysomatic nerves.
- Involuntary sphincters are stimulated byautonomic nerves.
Wiki User
∙ 11y ago
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